Standardize unmount implementations across backends

Cargo.toml

@@ -39,6 +39,10 @@ async-trait = { version = "0.1", optional = true }
 tokio = { version = "1.48.0", features = ["rt", "rt-multi-thread"], optional = true }
 zerocopy = { version = "0.8", features = ["derive"] }
 nix = { version = "0.30.0", features = ["fs", "user", "poll", "socket", "uio", "mount", "process", "ioctl"] }
+bimap = "0.6.3"
+dashmap = "6.2.1"
+lazy_static = "1.5.0"
+regex = "1.12.4"
 
 [dev-dependencies]
 env_logger = "0.11.7"
@@ -47,6 +51,8 @@ bincode = "1.3.1"
 serde = { version = "1.0.102", features = ["std", "derive"] }
 tempfile = "3.10.1"
 nix = { version = "0.30.0", features = ["poll", "fs", "ioctl"] }
+procfs = "0.18.0"
+test-log = "0.2.21"
 
 [build-dependencies]
 pkg-config = "0.3.14"

build.rs

@@ -47,6 +47,9 @@ fn main() {
 }
 
 fn configure_libfuse3() -> Result<(), pkg_config::Error> {
+    eprintln!(
+        "Using libfuse3 as the mount backend may cause memory leaks in some scenarios, for example, if AutoUnmount is set."
+    );
     pkg_config::Config::new()
         .atleast_version("3.0.0")
         .probe("fuse3")?;